Which word can best describe the feeling of most people waiting for the train？
A. joyful.
B. anxious.
C. excited.
D. uncertain.
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What can we know from Dr. Blaser and his studies？
A. People haven"t identified the long-term bad effects of antibiotics.
B. Alterations in the microbiome are found to be linked to many diseases.
C. He found people of all ages showed increased weight gain by using antibiotics.
D. He found an association between childhood antibiotic treatment and the later disease.
The phrase "in borderline cases" in Paragraph Six means that
A. when patients can"t make up a decision.
B. when antibiotics can be used or not used.
C. when doctors can"t diagnose ear infections.
D. when patients are in dangerous situations.
According to what Dr. Jonathan Finkelstein has said in Paragraph Five, we can infer that
A. there isn t any harm or side-effect of using antibiotics.
B. antibiotics help doctors remarkably in practice since the mid-90s.
C. there may be some bad effects of using antibiotics we don"t know.
D. doctors have to point out the risks of using antibiotics in treatment.
What is the purpose of telling a story of the sickest child at the beginning？
A. To explain the reason why I love antibiotics.
B. To prove the power of antibiotics in certain cases.
C. To show the importance of professional knowledge.
D. To illustrate how to save a child in dangerous situations.
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